Toyotomi Hideyoshi (豊臣秀吉, 1537-1598) launched two military campaigns against Korea, the first in 1592 and the second in 1597. The first invasion is called the Imjin War (壬辰倭亂), and the second one in 1597, the Chŏngyu War (丁酉再亂). A central reason for these invasions was Korea's refusal to permit Japanese forces to pass through its territory en route to Hideyoshi's planned conquest of China...
The Invasions of Korea 1592, 1597
The Invasions of Korea 1592, 1597